🔴 高危 | CVE-2026-52934 — In the Linux kernel, the following vulnerability has be
🔴 《高危安全漏洞：CVE-2026-52934》
CVSS 评分: 高危（8.8） CVE ID: CVE-2026-52934
漏洞描述
In the Linux kernel, the following vulnerability has been resolved:
batman-adv: tvlv: reject oversized TVLV packets
batadv_tvlv_container_ogm_append() builds a TVLV packet section from
the tvlv.container_list. The total size of this section is computed by
batadv_tvlv_container_list_size(), which sums the sizes of all registered
containers.
The return type and accumulator in batadv_tvlv_container_list_size() were
u16. If the accumulated size exceeds U16_MAX, the value wraps around,
causing the subsequent allocation in batadv_tvlv_container_ogm_append()
to be undersized. The memcpy-style copy that follows would then write
beyond the end of the allocated buffer, corrupting kernel memory.
Fix this by widening the return type of batadv_tvlv_container_list_size()
to size_t. In batadv_tvlv_container_ogm_append(), check the computed length
against U16_MAX before proceeding, and bail out as if the allocation had
failed when the limit is exceeded.
| 字段 | 值 |
|---|---|
| CVE ID | CVE-2026-52934 |
| CVSS 评分 | 8.8 |
| 严重程度 | 高危 |
| 发布时间 | 2026-06-24 |
| 状态 | Received |
数据来源: NVD | 获取时间: 2026-06-28 18:14